Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
  • C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
  • C08G63/695—Polyesters containing atoms other than carbon, hydrogen and oxygen containing silicon
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/08—Processes
  • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
  • C08G18/4866—Polyethers having a low unsaturation value
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/71—Monoisocyanates or monoisothiocyanates
  • C08G18/718—Monoisocyanates or monoisothiocyanates containing silicon
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
  • C08G63/91—Polymers modified by chemical after-treatment
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
  • C09J175/04—Polyurethanes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
  • C09J175/04—Polyurethanes
  • C09J175/06—Polyurethanes from polyesters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2170/00—Compositions for adhesives
  • C08G2170/20—Compositions for hot melt adhesives
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2250/00—Compositions for preparing crystalline polymers

Definitions

• the field relates to silane-functional polyesters which are used as constituents in moisture-curing compositions such as adhesives, sealants or coatings based on silane-terminated polymers.
• moisture-curing compositions as adhesives, sealants or coatings which have high initial strength.
• adhesives having a low initial strength have the disadvantage that the parts joined by adhesive must be fixed until a certain strength is established so that they remain in the desired position.
• Hot or hot melt adhesives have the disadvantage that their viscosity increases very rapidly immediately after application. As a result, for example, corrections in the alignment of two substrates to be bonded after joining are only possible with difficulty. Furthermore, these adhesives are usually too elastic for many applications to compensate for thermal expansion.
• hot or hot melt adhesives are known in which only a portion of the moisture-reactive components is solid at room temperature. These generally contain a reactive, reactive component as well as a reactive one or non-reactive melt component. In order to obtain compositions which have the best possible mechanical properties, reactive melt components are preferred, the spectrum of which is very broad.
• the reactive melt components used are preferably reaction products of any desired polyols with polyisocyanates, which are subsequently reacted with amino or mercaptosilanes. For example, such a composition is described in WO 2004/005420 A1 ,
• silane-functional polymer which, as a constituent in moisture-curing compositions based on silane-functional polymers, leads to compositions which can be used as adhesives, sealants or coatings having an improved initial strength.
• the present invention in a first aspect is a silane-functional polyester of the formula (I).
• the radical Y is an n-valent radical of a solid at room temperature, hydroxyl-terminated polyester P after removal of n hydroxyl groups.
• the radical R 1 is a linear or branched, monovalent hydrocarbon radical having 1 to 12 C atoms, which optionally has one or more CC multiple bonds and / or optionally cycloaliphatic and / or aromatic moieties.
• R 1 is a methyl, ethyl or isopropyl group.
• the radical R 2 is an acyl radical or a linear or branched, monovalent hydrocarbon radical having 1 to 12 C atoms, which optionally has one or more CC multiple bonds and / or optionally cycloaliphatic and / or aromatic moieties.
• the radical R 2 is preferably an acyl or alkyl group having 1 to 5 C atoms, in particular a methyl or an ethyl or an isopropyl group.
• the radical R 3 is a linear or branched divalent hydrocarbon radical having 1 to 12 C atoms, which optionally has cyclic and / or aromatic moieties, and optionally one or more heteroatoms.
• the radical R 3 is preferably an alkylene radical having 1 to 3 C atoms, in particular 3 C atoms.
• subscript a stands for a value of 0, 1 or 2, in particular for 0 or 1.
• the index n stands for a value of 1 to 3, in particular for 2.
• R 1 and R 2 each independently of one another represent the radicals described.
• polymer in the present document comprises on the one hand a collective of chemically uniform, but differing in terms of degree of polymerization, molecular weight and chain length macromolecules, which was prepared by a polyreaction (polymerization, polyaddition, polycondensation).
• polyreaction polymerization, polyaddition, polycondensation
• the term also encompasses derivatives of such a collective of macromolecules from polyreactions, compounds which have been obtained by reactions, such as additions or substitutions, of functional groups on given macromolecules and which may be chemically uniform or chemically nonuniform.
• prepolymers that is, reactive oligomeric pre-adducts whose functional groups are involved in the construction of macromolecules.
• polyurethane polymer includes all polymers which are prepared by the so-called diisocyanate polyaddition process. This also includes those polymers which are almost or completely free of urethane groups. Examples of polyurethane polymers are polyether-polyurethanes, polyester-polyurethanes, polyether-polyureas, polyureas, polyester-polyureas, polyisocyanurates and polycarbodiimides.
• silane and “organosilane” refer to compounds which on the one hand at least one, usually have two or three, via Si-O bonds, directly attached to the silicon atom alkoxy groups or acyloxy groups, and on the other hand, at least one, via an Si-C bond, directly bonded to the silicon atom organic radical.
• silanes are also known to the person skilled in the art as organoalkoxysilanes or organoacyloxysilanes.
• silane group denotes the silicon-containing group bound to the silane-bonded organic group via the Si-C bond
• Organosilanols that is, organosilicon compounds containing one or more silanol groups (Si-OH groups) and, by subsequent condensation reactions, organosiloxanes, that is, organosiloxanes containing one or more siloxane groups (Si-O-Si groups).
• silane-functional refers to compounds having silane groups.
• silane-functional polymers are accordingly polymers which have at least one silane group.
• aminosilanes or “mercaptosilanes” organosilanes are referred to, the organic radical having an amino group or a mercapto group.
• primary aminosilanes aminosilanes are referred to which have a primary amino group, ie an NH 2 group which is bonded to an organic radical.
• secondary aminosilanes aminosilanes are referred to which have a secondary amino group, ie an NH group which is bonded to two organic radicals.
• molecular weight is meant in this document always the molecular weight average M n (number average).
• solid means substances which do not change their shape without external action or which are difficult to deform, but in particular are not flowable.
• liquid substances that can be deformed and are flowable, which also includes highly viscous and pasty substances.
• room temperature is referred to in this document a temperature of 23 ° C.
• Suitable hydroxyl-terminated polyesters P are, in particular, polyesters which are prepared by known processes, in particular the polycondensation of hydroxycarboxylic acids or the polycondensation of aliphatic and / or aromatic polycarboxylic acids with dihydric or polyhydric alcohols.
• polyester polyols which are prepared from dihydric to trihydric alcohols, for example 1,2-ethanediol, diethylene glycol, 1,2-propanediol, dipropylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, Neopentyl glycol, glycerol, 1,1,1-trimethylolpropane or mixtures of the abovementioned alcohols with organic dicarboxylic acids or their anhydrides or esters such as succinic acid, glutaric acid, adipic acid, trimethyladipic acid, suberic acid, sebacic acid, dodecanedicarboxylic acid, maleic acid, fumaric acid, dimer fatty acid, phthalic acid, Phthalic anhydride, isophthalic acid, terephthalic acid, dimethyl terephthalate, hexahydrophthalic acid, trimellitic acid and trimelli
• polyesterdiols in particular those prepared from adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, dimer fatty acid, phthalic acid, isophthalic acid and terephthalic acid as dicarboxylic acid or from lactones such as ⁇ -caprolactone and from ethylene glycol, diethylene glycol, neopentyl glycol, 1,4-butanediol , 1,6-hexanediol, dimer fatty acid diol and 1,4-cyclohexanedimethanol as the dihydric alcohol.
• the hydroxyl-terminated polyester P is preferably a crystalline polyester.
• the polyester P has an average molecular weight M n of> 2500 g / mol to 7000 g / mol. Most preferably, the average molecular weight M n of the polyester P is in the range from 3500 g / mol to 6000 g / mol.
• the crystallization point of the polyester P is preferably less than 30 ° C below the melting point of the polyester P.
• compositions comprising a reactive melt component based on a polyester P according to the invention , in which the crystallization point of the polyester P is less than 30 ° C. below the melting point of the polyester P , are particularly preferred, because thereby the time interval from the application of the composition with melted melt component, can be shortened until reaching a sufficient, caused by crystallization of the melt component, initial strength.
• substrates which are adhesively bonded together with an adhesive based on compositions containing a reactive melt component according to the invention need not be fixed or only for a short time until a sufficient initial strength of the adhesive is achieved so that they do not shift relative to each other. This is particularly advantageous in vertical bonding, for example in the bonding of a windshield of a vehicle or a means of transport.
• Silane-functional polyesters of the formula (I) according to the invention are typically obtainable by reacting an isocyanatosilane IS of the formula (II) with a polyester P described above.
• R 1 , R 2 , R 3 and a have already been described above.
• This reaction is carried out in a stoichiometric ratio of the isocyanate groups to the hydroxyl groups of the polyester P of 1: 1, or with a slight excess of hydroxyl groups, for example at temperatures of 20 ° C to 100 ° C, optionally with concomitant use of catalysts.
• Suitable isocyanatosilanes IS of the formula (II) are 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyldimethoxymethylsilane, and their analogs having ethoxy or isopropoxy groups in place of the methoxy groups on the silicon.
• the present invention relates to the use of a silane-functional polyester according to the above description as a component in moisture-curing adhesives, sealants or coatings based on silane-terminated polymers, in particular in moisture-curing adhesives.
• Suitable moisture-curing adhesives, sealants or coatings based on silane-terminated polymers are, in particular, moisture-curing compositions comprising at least one silane-functional polymer STP, which in particular has end groups of the formula (III).
• R 1 , R 2 , R 3 and a have already been described above.
• the silane-functional polymer STP is a silane-functional polyurethane polymer STP1 obtainable by reacting a silane having at least one isocyanate-reactive group with a polyurethane polymer having isocyanate groups. This reaction is preferably carried out in a stoichiometric ratio of the isocyanate-reactive groups to the isocyanate groups of 1: 1 or with a slight excess of isocyanate-reactive groups, so that the resulting silane-functional polyurethane polymer STP1 is completely free from isocyanate groups.
• the silane which has at least one isocyanate-reactive group is, in particular, a mercaptosilane or an aminosilane, preferably an aminosilane.
• the aminosilane is preferably an aminosilane AS of the formula (IV) wherein R 1 , R 2 , R 3 and a have already been described above, and R 11 is a hydrogen atom or a linear or branched hydrocarbon radical having 1 to 20 C atoms, which optionally has cyclic moieties, or a radical of the formula (V) stands.
• the radicals R 12 and R 13 independently of one another represent a hydrogen atom or a radical from the group comprising -R 15 , -CN and -COOR 15 .
• the radical R 14 is a hydrogen atom or a radical from the group comprising -CH 2 -COOR 15 , -COOR 15 , -CONHR 15 , -CON (R 15 ) 2 , -CN, -NO 2 , -PO (OR 15) 2, -SO 2 R 15 and -SO 2O R 15th
• the radical R 15 is a, optionally containing at least one heteroatom, hydrocarbon radical having 1 to 20 carbon atoms.
• suitable aminosilanes AS of the formula (IV) are primary aminosilanes such as 3-aminopropyltrimethoxysilane, 3-aminopropyldimethoxymethylsilane; secondary aminosilanes such as N-butyl-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane; the Michael-like addition products of primary aminosilanes such as 3-aminopropyltrimethoxysilane or 3-aminopropyldimethoxymethylsilane to Michael acceptors such as acrylonitrile, acrylic and methacrylic acid esters, acrylic or methacrylic acid amides, maleic and fumaric diesters, citraconic diesters and itaconic diesters, for example N- (3 Trimethoxysilyl-propyl) -amino-succinic acid dimethyl and diethyl ester; and analogs of said aminosi
• aminosilanes AS are secondary aminosilanes, in particular aminosilanes AS, in which R 11 in formula (IV) is different from H.
• Morphosel acceptor in the present document denotes compounds which, owing to the double bonds which are activated by electron acceptor radicals, are capable of reacting with primary amino groups (NH 2 groups) in a manner analogous to Michael addition, nucleophilic addition reactions ( hetero-Michael addition).
• Suitable polyurethane polymers containing isocyanate groups for preparing a silane-functional polyurethane polymer STP1 are, for example, polymers which are obtainable by the reaction of at least one polyol with at least one polyisocyanate, in particular a diisocyanate. This reaction can be carried out by reacting the polyol and the polyisocyanate with customary processes, for example at from 50 ° C. to 100 ° C., if appropriate with concomitant use of suitable catalysts, the polyisocyanate being metered in such a way that its isocyanate groups in the Ratio to the hydroxyl groups of the polyol in stoichiometric excess are present.
• the excess of polyisocyanate is chosen so that in the resulting polyurethane polymer after the reaction of all hydroxyl groups of the polyol, a content of free isocyanate groups from 0.1 to 5 wt .-%, preferably 0.1 to 2.5 wt .-%, particularly preferably 0.2 to 1 wt. -%, based on the total polymer, remains.
• the polyurethane polymer may be prepared using plasticizers, with the plasticizers used containing no isocyanate-reactive groups.
• polyurethane polymers having the stated content of free isocyanate groups which are obtained from the reaction of diisocyanates with high molecular weight diols in an NCO: OH ratio of 1.5: 1 to 2: 1.
• Suitable polyols are in particular polyether polyols, polyester polyols and polycarbonate polyols and mixtures of these polyols.
• Suitable polyether polyols also called polyoxyalkylene polyols or oligoetherols, are in particular those which are polymerization products of ethylene oxide, 1,2-propylene oxide, 1,2- or 2,3-butylene oxide, oxetane, tetrahydrofuran or mixtures thereof, optionally polymerized with the aid of a starter molecule with two or more active hydrogen atoms such as water, ammonia or compounds with multiple OH or NH groups such as 1,2-ethanediol, 1,2- and 1,3-propanediol, neopentyl glycol, diethylene glycol, triethylene glycol, the isomeric dipropylene glycols and Tripropylene glycols, the isomeric butanediols, pentanediols, hexanediols, heptanediols, octanediols, nonanediols,
• Both polyoxyalkylene polyols having a low degree of unsaturation (measured according to ASTM D-2849-69 and expressed in milliequivalents of unsaturation per gram of polyol (mEq / g)) prepared, for example, by means of so-called double metal cyanide complex catalysts (DMC Catalysts), as well as polyoxyalkylene polyols having a higher degree of unsaturation, prepared for example with the aid of anionic catalysts such as NaOH, KOH, CsOH or alkali metal alkoxides.
• Particularly suitable are polyoxyethylene polyols and polyoxypropylene polyols, in particular polyoxyethylene diols, polyoxypropylene diols, polyoxyethylene triols and polyoxypropylene triols.
• polyoxyalkylenediols or polyoxyalkylenetriols having a degree of unsaturation lower than 0.02 meq / g and having a molecular weight in the range from 1,000 to 30,000 g / mol, and also polyoxyethylenediols, polyoxyethylenetriols, polyoxypropylenediols and polyoxypropylenetriols having a molecular weight of from 400 to 8,000 g / mol.
• ethylene oxide terminated (“EO endcapped", ethylene oxide endcapped) polyoxypropylene polyols.
• EO endcapped ethylene oxide endcapped polyoxypropylene polyols.
• the latter are special Polyoxypropylenpolyoxyethylenpolyole, which are obtained, for example, that pure polyoxypropylene, in particular polyoxypropylenediols and triols, after completion of the Polypropoxylation reaction with ethylene oxide are further alkoxylated and thereby have primary hydroxyl groups.
• Preferred in this case are polyoxypropylene polyoxyethylene diols and polyoxypropylene polyoxyethylene triols.
• styrene-acrylonitrile grafted polyether polyols such as are commercially available for example under the trade name Lupranol ® by the company Elastogran GmbH, Germany.
• polyester polyols are, for example, polyesters as described above as polyester P, the molecular weight of these polyester polyols used to prepare the silane-functional polymer P being selected such that the polyester polyols are liquid at room temperature.
• Suitable polycarbonate polyols are, in particular, those which are obtainable by reacting, for example, the abovementioned alcohols used for the synthesis of the polyester polyols with dialkyl carbonates, such as dimethyl carbonate, diaryl carbonates, such as diphenyl carbonate or phosgene.
• dialkyl carbonates such as dimethyl carbonate, diaryl carbonates, such as diphenyl carbonate or phosgene.
• Particularly suitable are polycarbonate diols, in particular amorphous polycarbonate diols.
• polystyrene resins are poly (meth) acrylate polyols.
• polyhydroxy-functional fats and oils for example natural fats and oils, in particular castor oil, or so-called oleochemical polyols obtained by chemical modification of natural fats and oils, the epoxy polyesters obtained, for example, by epoxidation of unsaturated oils and subsequent ring opening with carboxylic acids or alcohols
• Epoxypolyethers or polyols obtained by hydroformylation and hydrogenation of unsaturated oils.
• polyols which are obtained from natural fats and oils by degradation processes such as alcoholysis or ozonolysis and subsequent chemical linkage, for example by transesterification or dimerization, of the degradation products thus obtained or derivatives thereof, to be obtained.
• Suitable degradation products of natural fats and oils are in particular fatty acids and fatty alcohols and fatty acid esters, in particular the methyl esters (FAME), which can be derivatized for example by hydroformylation and hydrogenation to hydroxy fatty acid esters.
• FAME methyl esters
• polyhydrocarbon polyols also called oligohydrocarbonols, for example polyhydroxy-functional ethylene-propylene, ethylene-butylene or ethylene-propylene-diene copolymers, as are produced, for example, by Kraton Polymers, USA, or polyhydroxy-functional copolymers of dienes, such as 1,3-butadiene or diene mixtures and vinyl monomers such as styrene, acrylonitrile or isobutylene, or polyhydroxy-functional polybutadiene polyols, for example those which are prepared by copolymerization of 1,3-butadiene and allyl alcohol or by oxidation of polybutadiene and may also be hydrogenated.
• oligohydrocarbonols for example polyhydroxy-functional ethylene-propylene, ethylene-butylene or ethylene-propylene-diene copolymers, as are produced, for example, by Kraton Polymers, USA, or polyhydroxy-functional copolymers of dienes
• polyhydroxy-functional acrylonitrile / butadiene copolymers as they can be prepared, for example, from epoxides or aminoalcohols and carboxyl-terminated acrylonitrile / butadiene copolymers (commercially available under the name Performance Hypro ® CTBN from the company Emerald Performance Materials, LLC, USA).
• These stated polyols preferably have an average molecular weight of from 250 to 30,000 g / mol, in particular from 1,000 to 30,000 g / mol, and an average OH functionality in the range from 1.6 to 3.
• polyether polyols in particular polyoxyethylene polyol, polyoxypropylene polyol and polyoxypropylene polyoxyethylene polyol, preferably polyoxyethylene diol, polyoxypropylene diol, polyoxyethylene triol, polyoxypropylene triol, polyoxypropylene polyoxyethylene diol and polyoxypropylene polyoxyethylene triol.
• small amounts of low molecular weight di- or polyhydric alcohols such as 1,2-ethanediol, 1,2- and 1,3-propanediol, neopentyl glycol, diethylene glycol, triethylene glycol, the isomeric dipropylene glycols and tripropylene glycols, the isomeric butanediols, pentanediols, hexanediols, heptanediols, octanediols, nonanediols, decanediols, undecanediols, 1,3- and 1,4- Cyclohexanedimethanol, hydrogenated bisphenol A, dimeric fatty alcohols, 1,1,1-trimethylolethane, 1,1,1-trimethylolpropane, glycerol, pentaerythritol, sugar alcohols such as xylito
• polyisocyanates in particular diisocyanates, can be used as polyisocyanates for the preparation of the polyurethane polymer.
• silane-functional polymers are STP1 commercially available under the trade name Polymer ST50 from the company Hanse Chemie AG, Germany, and under the trade name Desmoseal ® from Bayer MaterialScience AG, Germany.
• the silane-functional polymer STP in a second embodiment is a silane-functional polyurethane polymer STP2 obtainable by the reaction of an isocyanatosilane IS of the formula (II), as described above, with a polymer which has isocyanate-reactive functional end groups, in particular hydroxyl groups, mercapto groups and / or amino groups. This reaction is carried out in the stoichiometric ratio of the isocyanate groups to the isocyanate-reactive functional end groups of 1: 1, or with a slight excess of isocyanate-reactive functional end groups, for example at temperatures of 20 ° C to 100 ° C, optionally with concomitant use of catalysts.
• the polymer preferably has hydroxyl groups as isocyanate-reactive functional end groups.
• polymers having hydroxyl groups are suitable are already mentioned high molecular weight polyoxyalkylene polyols, preferably polyoxypropylene diols having a degree of unsaturation lower than 0.02 meq / g and having a molecular weight in the range from 4000 to 30,000 g / mol, in particular those having a molecular weight in the range from 8,000 to 30 '000 g / mol.
• hydroxyl-terminated, in particular hydroxyl-terminated, polyurethane polymers are also suitable for reaction with isocyanatosilanes IS.
• Such polyurethane polymers are obtainable by the reaction of at least one polyisocyanate with at least one polyol. This reaction can be carried out by reacting the polyol and the polyisocyanate with customary processes, for example at from 50 ° C. to 100 ° C., if appropriate with concomitant use of suitable catalysts, the polyol being metered in such a way that its hydroxyl groups in the Ratio to the isocyanate groups of the polyisocyanate in stoichiometric excess are present.
• the polyurethane polymer can be prepared with the concomitant use of plasticizers, wherein the plasticizers used contain no isocyanate-reactive groups. Suitable for this reaction are the same polyols and polyisocyanates already mentioned as being suitable for preparing an isocyanate group-containing polyurethane polymer used to prepare a silane-functional polyurethane polymer STP1 .
• silane-functional polymers STP2 are commercially available under the trade names SPUR + ® 1010LM, 1015LM and 1050MM from the Momentive Performance Materials Inc., USA, and sold under the trade name Geniosil ® STP-E15, STP-10 and STP-E35 by the company Wacker Chemie AG, Germany.
• the silane-functional polymer STP is a silane-functional polymer STP3 obtainable by a hydrosilylation reaction of polymers having terminal double bonds, for example poly (meth) acrylate polymers or polyether polymers, in particular allyl-terminated polyoxyalkylene polymers, described, for example, in US Pat US 3,971,751 and US 6,207,766 , the disclosure of which is hereby incorporated by reference.
• silane-functional polymers are STP3 commercially available ® under the trade name MS-Polymer ®, in particular as MS Polymer S203H, S303H, S227, S810, MA903 and S943, silyl ® SAX220, SAX350, SAX400 and SAX725, silyl ® SAT350 and SAT400, and XMAP ® SA100S and SA310S from the company Kaneka Corp., Japan, and sold under the trade name Excestar ® S2410, S2420, S3430, S3630, W2450 and MSX931 of Asahi Glass Co, Ltd., Japan.
• the silane-functional polymer STP is present in an amount of from 10 to 80% by weight, preferably in an amount of from 15 to 60% by weight, based on the total composition.
• silane-functional polyester as described above in moisture-curing adhesives, sealants or coatings based on silane-functional polyurethane polymers, in particular of silane-functional polyurethane polymer of the STP1 type .
• the invention relates to the use of a silane-functional polyester as described above as a constituent in a moisture-curing adhesive, which is a two-component, moisture-curing adhesive consisting of a component A comprising at least one silane-functional polyester of the formula (I), as previously and at least one silane-terminated polymer STP, and a component B comprising water.
• the component A of the two-component, moisture-curing adhesive corresponds to a moisture-curing composition as described above and is therefore such that it can cure completely by itself by means of atmospheric moisture.
• a cured adhesive provides comparable final strength values as the mixture of components A and B after cure.
• component B is a hydrous paste in which the water contained is thickened by at least one support material which is typically selected from the group consisting of a plasticizer, a thickener and a filler.
• component B can be varied depending on the embodiment of component A.
• amount of component B used depends on the amount of water contained therein. If, for example, component B contains a high water content of> 50% by weight, then component B is usually used in an amount of from 1 to 10% by weight, based on the amount of component A. Contains the By contrast, component B , for example, only about 5% by weight of water, component B can also be used in an amount of about 50% by weight, based on the amount of component A.
• the proportion of water in the total bicomponent composition is in the range that can be reacted with the water present 50 to 100% of all reactive groups in the composition.
• the described two-component composition is used such that the weight ratio of component A to component B is ⁇ 1: 1, in particular from 3: 1 to 70: 1, preferably from 10: 1 to 20: 1.
• components A and B are typically stored in separate packages or in a package having two separate chambers.
• the component A is in this case in one chamber and the component B is present in the other chamber of the package.
• Suitable packages are, for example, double cartridges, such as twin or coaxial cartridges, or multi-chamber tubular bags with adapters.
• the mixing of the two components A and B by means of a static mixer, which can be placed on the package with two chambers.
• the two components A and B are typically stored separately in barrels or hobbocks and pressed out during application, for example by means of gear pumps, and mixed.
• the composition can be applied to a substrate by hand or in an automated process by means of robots.
• the invention relates to the use of a silane-functional polyester as described above as a reactive melt component in moisture-curing hot or hot melt adhesives based on silane-terminated polymers, as described above.
• the novel silane-functional polyesters of the formula (I) are solid at room temperature and are melted by heating the moisture-curing hot or hot-melt adhesive. After application of the adhesive in the heated state, this solidifies on the one hand during cooling by crystallization of the melt component and crosslinked on the other hand via a reaction with water.
• the water may either originate from the air (atmospheric moisture), or may be added to the adhesive, for example in the form of a water-containing component as described above.
• Hot melt adhesives are usually applied at temperatures of about 40 ° C to 80 ° C.
• the application temperature of hot-melt adhesives is usually above about 80 ° C. However, it will be understood by those skilled in the art that these ranges overlap and there is no sharp boundary between hot and hot melt adhesives.
• Hot or hot-melt adhesives here are understood to mean not only adhesives which are completely solid at room temperature, but also those which are liquid at room temperature but contain a fusible component which is solid at room temperature.
• Such an adhesive has the advantage over a pure reactive hot or hot melt adhesive in which the entire reactive polymer component is used as a melt component, that it still has some deformability after application, whereby simple corrections for large-area bonds are still possible. Compared with moisture-curing adhesives which have no melt component, such an adhesive offers the advantage that it has a significantly improved initial strength.
• the silane-functional polymer STP is a silane-functional polyurethane polymer, in particular a silane-functional polyurethane polymer of the type STP1.
• the composition further contains at least one filler.
• the filler affects both the rheological properties of the uncured composition and the mechanical properties and surface finish of the cured composition.
• Suitable fillers are inorganic and organic fillers, for example natural, ground or precipitated calcium carbonates, which are optionally coated with fatty acids, in particular stearic acid, barium sulfate (BaSO 4 , also called barite or barite), calcined kaolins, aluminum oxides, aluminum hydroxides, silicic acids, in particular highly dispersed silicas from pyrolysis processes, Russian, in particular industrially produced carbon black (hereinafter referred to as "carbon black”), PVC powder or hollow spheres.
• fatty acids in particular stearic acid, barium sulfate (BaSO 4 , also called barite or barite)
• BaSO 4 barium sulfate
• calcined kaolins aluminum oxides
• aluminum hydroxides aluminum hydroxides
• Preferred fillers are calcium carbonates, calcined kaolins, carbon black, finely divided silicas and flame-retardant fillers, such as hydroxides or hydrates, in particular hydroxides or hydrates of aluminum, preferably aluminum hydroxide.
• a suitable amount of filler is for example in the range of 20 to 60 wt .-%, preferably 30 to 60 wt .-%, based on the total composition.
• the composition according to the invention contains in particular at least one catalyst for the crosslinking of the silane-functional polymers by means of moisture.
• catalysts are, in particular, metal catalysts in the form of organotin compounds such as dibutyltin dilaurate and dibutyltin diacetylacetonate, titanium catalysts, amino-containing compounds, for example 1,4-diazabicyclo [2.2.2] octane and 2,2'-dimorpholinodiethyl ether, aminosilanes and mixtures of the stated catalysts.
• composition according to the invention may additionally contain further constituents.
• constituents are plasticizers such as esters of organic carboxylic acids or their anhydrides, such as phthalates, for example dioctyl phthalate, diisononyl phthalate or diisodecyl phthalate, adipates, for example dioctyl adipate, azelates and sebacates, polyols, for example polyoxyalkylene polyols or polyester polyols, organic phosphoric and sulfonic acid esters or polybutenes; Solvent; Fibers, such as polyethylene; dyes; pigments; Rheology modifiers such as thickening agents or thixotropic agents, for example urea compounds of the type used as a thixotropic endowning agent in WO 02/48228 A2 described on pages 9 to 11, polyamide waxes, bentonites or fumed silicas; Adhesion promoters, for example epoxysilanes,
• composition described above is preferably prepared and stored in the absence of moisture.
• the composition is shelf-stable, that is, it can be stored in the absence of moisture in a suitable package or assembly, such as a keg, bag or cartridge, for a period of time from several months to one year and longer without they change in their application properties or in their properties after curing in a relevant for their use to the extent.
• the silane groups of the polymer come into contact with moisture.
• the silane groups have the property when in contact hydrolyze with moisture. This forms organosilanols and, by subsequent condensation reactions, organosiloxanes. As a result of these reactions, which can be accelerated by the use of catalysts, the composition finally hardens. This process is also referred to as networking.
• the water needed for curing can either come from the air (atmospheric moisture), or else the above-described composition can be contacted with a water-containing component, for example by painting, for example with a smoothing agent, or by spraying, or it can the composition in the application of a water-containing component may be added, for example in the form of a water-containing paste, which, for example, via a static mixer, is mixed.
• a water-containing component for example by painting, for example with a smoothing agent, or by spraying, or it can the composition in the application of a water-containing component may be added, for example in the form of a water-containing paste, which, for example, via a static mixer, is mixed.
• the composition cures from the outside inwards.
• the rate of cure is determined by various factors, such as the rate of diffusion of the water, the temperature, the ambient humidity and the adhesive geometry, and usually slows as the cure progresses.
• composition according to the invention can also be used in a method of sealing or coating comprising the steps i ') application of a composition according to the above description to a substrate S1 and / or between two substrates S1 and S2; ii ') curing the composition by means of water, in particular in the
• step i) or i ') of the application of the composition is preceded by a step of heating the adhesive, in which the polyester of the formula (I) according to the invention is melted as the melt component ,
• step i) or i ') of the application of the composition is preceded by a step of mixing the two components A and B.
• step i) or i ') of the application of the composition is followed by a step of heating the adhesive, in particular component A, and then mixing the two components A and B ahead.
• Suitable substrates S1 and / or S2 are in particular substrates which are selected from the group consisting of concrete, mortar, brick, brick, gypsum, a natural stone such as granite or marble, glass, glass ceramic, metal or metal alloy, wood, plastic and lacquer ,
• composition according to the invention is typically applied to the substrate by means of a suitable device, preferably in the form of a bead, this advantageously having a substantially round or triangular cross-sectional area.
• suitable methods for applying the composition are, for example, the application of commercially available cartridges, which are operated manually or by means of compressed air, or from a barrel or hobbock by means of a feed pump or an extruder, optionally by means of an application robot.
• a composition according to the invention with good application properties has high stability and a short yarn tension. This means that it remains in the applied form after application, so it does not flow apart and, after the application device has been set down, it pulls no or only a very short thread, so that the substrate is not contaminated.
• the invention relates to a cured composition which is obtainable by the reaction of a previously described composition with water, in particular in the form of atmospheric moisture.
• the articles which are adhesively bonded, sealed or coated with a composition according to the invention are, in particular, an industrially produced good or a consumer good, in particular a window, a domestic appliance, or a means of transport, in particular a vehicle, or an attachment of a vehicle.
• melt components having a crystallization point below room temperature are of limited usefulness and not preferred since crystallization of the melt component should occur at room temperature. Likewise not preferred are melt components whose crystallization point is more than 30 ° C below their melting point, since in this case it takes a relatively long time to reach a sufficient initial strength.
• the modulus of elasticity at 0 to 5% elongation was determined in accordance with DIN EN 53504 (tensile speed: 200 mm / min) on films cured at 23 ° C. and 50% relative atmospheric humidity for 7 days with a layer thickness of 2 mm.
• the Shore A hardness was determined according to DIN 53505, to test specimens cured at 23 ° C. and 50% relative humidity for 7 days with a layer thickness of 6 mm.
• the compositions were each filled into a cartridge. Thereafter, the cartridges were opened and a nozzle of 5 mm inside diameter was screwed on.
• the "Zwick 1120" dispenser was used to determine the force needed to squeeze the composition at a squeezing speed of 60 mm / min. The value given is an average of the forces measured after 22 mm, 24 mm, 26 mm and 28 mm. After 30 mm extrusion was stopped. In the same way, the extrusion force was determined at 70 ° C. For this purpose, the cartridges were heated to a temperature of 70 ° C before the determination of the extrusion force.
• the initial strength of the compositions was determined by the slip-off behavior of the adhesive under static load.
• a triangular adhesive bead (width: 10 mm, height: 12 mm) was applied horizontally to a vertically positioned glass pane at a temperature of 70 ° C., after 30 seconds with a glass test body (100 ⁇ 40 ⁇ 6 mm) having a mass of 120 g compressed on the entire width of 40 mm of the largest surface of the glass test specimen (equivalent to 30 g / cm) to 5 mm and fixed for 30 seconds. Thereafter, the fixation was released and it became the slip-off distance ("slip down") of the glass test specimen after 2 Minutes measured. Compositions with a slip distance of 0.5 mm or more have poor initial strength.
• N- (3-trimethoxysilyl-propyl) amino-succinic acid diethyl ester was prepared as follows: 13.4 g 3-aminopropyl-trimethoxysilane (Silquest ® A-1110, Momentive Performance Materials Inc., USA) were placed. With good stirring, 12.87 g of diethyl maleate (Fluka Chemie GmbH, Switzerland) were slowly added at room temperature and the mixture was stirred for 2 hours at room temperature.
• silane-functional polyurethane polymer according to the SH were indicated in Table 1 by weight, diisodecyl phthalate (Palatinol ® Z) and vinyltrimethoxysilane (Silquest ® A-171 from Momentive Performance Materials Inc., USA) were mixed well for 5 minutes. Then were dried, precipitated chalk (Socal ® U1S2, Solvay SA, Belgium) and dried Russ (Monarch ® 570 from Cabot Corp., USA) and the melting component (SKomp.1 - S Komp.7) which previously during two days in a Furnace was melted at 70 ° C, while kneaded at 60 ° C for 15 minutes.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• General Chemical & Material Sciences (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Sealing Material Composition (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Polyurethanes Or Polyureas (AREA)
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• 2009
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